In this medicinal cannabis module led by Dr. John Teh, participants are taken back to the basics of cannabis medicine with an emphasis on the two primary cannabinoids, THC and CBD, their effects, and their interaction with the body's endocannabinoid system which is integral to maintaining balance and homeostasis. The concept of the 'entourage effect', the synergistic benefit of whole plant extracts, and the importance of terpenes in determining cannabis effects are also explored. With visual aids and thorough explanations, the module provides a foundation for understanding the complex interactions that underpin the clinical use of medical cannabis.